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TinyGL example

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Toby Jaffey 2025-12-14 14:45:10 +00:00
parent 7313047fd1
commit 065d2c64aa
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apps/tinygl/build.zig Normal file
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const std = @import("std");
const CrossTarget = @import("std").zig.CrossTarget;
const Target = @import("std").Target;
const Feature = @import("std").Target.Cpu.Feature;
pub fn build(b: *std.Build) void {
var options = b.addOptions();
const heapsize = b.option(u32, "heapsize", "heap size in bytes") orelse 0; // -Dheapsize=u32
options.addOption(u32, "heapsize", heapsize);
const features = Target.riscv.Feature;
var disabled_features = Feature.Set.empty;
var enabled_features = Feature.Set.empty;
// disable all CPU extensions
disabled_features.addFeature(@intFromEnum(features.a));
disabled_features.addFeature(@intFromEnum(features.c));
disabled_features.addFeature(@intFromEnum(features.d));
disabled_features.addFeature(@intFromEnum(features.e));
disabled_features.addFeature(@intFromEnum(features.f));
// except multiply
enabled_features.addFeature(@intFromEnum(features.m));
const target = b.resolveTargetQuery(.{ .cpu_arch = Target.Cpu.Arch.riscv32, .os_tag = Target.Os.Tag.freestanding, .abi = Target.Abi.none, .cpu_model = .{ .explicit = &std.Target.riscv.cpu.generic_rv32 }, .cpu_features_sub = disabled_features, .cpu_features_add = enabled_features });
const exe = b.addExecutable(.{
.name = "tinygl",
.root_module = b.createModule(.{
.root_source_file = b.path("src/main.zig"),
.target = target,
.optimize = .ReleaseSmall,
}),
});
exe.root_module.addOptions("buildopts", options);
// add zeptolibc
const zeptolibc_dep = b.dependency("zeptolibc", .{
.target = target,
.optimize = .ReleaseSmall,
});
exe.root_module.addImport("zeptolibc", zeptolibc_dep.module("zeptolibc"));
exe.root_module.addIncludePath(zeptolibc_dep.path("include"));
exe.root_module.addIncludePath(zeptolibc_dep.path("include/zeptolibc"));
exe.addCSourceFiles(.{ .files = &.{
"src/TinyGL/src/api.c",
"src/TinyGL/src/specbuf.c",
"src/TinyGL/src/zmath.c",
"src/TinyGL/src/arrays.c",
"src/TinyGL/src/image_util.c",
"src/TinyGL/src/misc.c",
"src/TinyGL/src/texture.c",
"src/TinyGL/src/ztriangle.c",
"src/TinyGL/src/clear.c",
"src/TinyGL/src/init.c",
"src/TinyGL/src/msghandling.c",
"src/TinyGL/src/vertex.c",
"src/TinyGL/src/clip.c",
"src/TinyGL/src/light.c",
"src/TinyGL/src/zbuffer.c",
"src/TinyGL/src/error.c",
"src/TinyGL/src/list.c",
"src/TinyGL/src/zdither.c",
"src/TinyGL/src/get.c",
"src/TinyGL/src/matrix.c",
"src/TinyGL/src/select.c",
"src/TinyGL/src/zline.c",
}, .flags = &.{ "-Wall", "-fno-sanitize=undefined" } });
exe.addIncludePath(b.path("src/"));
exe.addIncludePath(b.path("src/TinyGL/include"));
exe.addIncludePath(b.path("src/TinyGL/src"));
b.installArtifact(exe);
exe.addAssemblyFile(b.path("../common/crt0.S"));
exe.setLinkerScript(b.path("../common/linker.ld"));
exe.addIncludePath(b.path("../../common"));
exe.addIncludePath(b.path("../common"));
const bin = b.addObjCopy(exe.getEmittedBin(), .{
.format = .bin,
});
bin.step.dependOn(&exe.step);
const copy_bin = b.addInstallBinFile(bin.getOutput(), "tinygl.bin");
b.default_step.dependOn(&copy_bin.step);
}